Question

Find f(-6) for f(x) = x² - 4x + 5. Be sure to show
your work.

Answer 1

substitute $-6$ in the equation:

$f(x)=x^{2} -4x+5,\\f(-6)=(-6)^{2} -4(-6)+5\\f(-6)=36+24+5\\f(-6)=\boxed{65}$